TPMS Systems

[walt2137]

Liberal I did the same but one winter some of the sensors would not register until they warmed up, low battery.
John my sensors on the Ford Flex, F150 and Kia only report or turn on a light on the dash when below about 25# no pressure readings or temp. I really can't see any reason for the temp readings anyway, they can't be accurate getting the readings from air in the valve stem.

[Timon]

Originally Posted by walt2137

John my sensors on the Ford Flex, F150 and Kia only report or turn on a light on the dash when below about 25# no pressure readings or temp. I really can't see any reason for the temp readings anyway, they can't be accurate getting the readings from air in the valve stem.

Then I consider my self fortunate that my Journey displays the actual pressures in real time. Considering the normal cold pressure is 36psi waiting to get an alarm down at 25 would not be very good.

As far as getting good temperature measurements that's the reason for putting in metal valve stems. The heat will transfer to the sensor more reliably than rubber. The better method would be to use an internal sensor which will get a better read. Problem with those is they cost more and are harder to install or replace.

[walt2137]

John the TST 507 system on our coach coach reads pressure and temp and the coach has metal stems, still don't see where it helps if the pressure is low the temp will rise but I will be looking at the pressure and that will be the alarm I am interested in.